Stearman 4. Specifications. A photo.
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Stearman 4. Specifications. A photo.

Stearman 4. Specifications. A photo.

Stearman 4 - American single-engine biplane designed and manufactures aircraft manufacturer «Stearman Aircraft» with 1930 years.

Photo Stearman 4

Development Stearman 4 multipurpose aircraft was conducted by American engineers on the basis of the model Stearman C3, appeared a few years earlier, and, due to the fact that the factual basis for the design of the aircraft already had, the engineers managed to quickly improve the flight characteristics of the aircraft, which is why the development is not They take longer and cost the aircraft itself much cheaper than originally anticipated.

The main purpose of the aircraft Stearman 4 served as the need to ensure civil aviation commercial aircraft suitable for transporting people and small loads. However, in addition to the commercial sphere, the plane is also actively used, and private owners, apply aircraft for their own needs and goals.

Stearman 4 a photo

Appearance and aircraft design Stearman 4 was almost completely borrowed from the model Stearman C3, but in terms of specifications, the aircraft has become more effective, in particular, has increased its flight speed, however, due to some changes, the plane partially lost its maneuverability that the however, it did not affect the safe operation of the aircraft.

Depending on their modification, on board the aircraft Stearman 4 can accommodate up to three people, but in addition to this configuration, the American aircraft manufacturers also produced and one double version of the aircraft. In addition to passenger traffic, aircraft Stearman 4 can also carry out transportation on its board and small goods, taking into account the mass of its own weight the pilot shall not exceed the 685 kg, however, in this case, there are also restrictions on the size of the shipment.

Aircraft Stearman 4

The powerplant of the Stearman 4 aircraft includes a single piston aircraft engine Wright J6-9 (the basic production version of the aircraft) capable of developing power in 300 hp, which in turn allowed the aircraft to accelerate to speed in 205 km / h. (maximum rate). The flight distance of the Stearman 4 is limited to 1045 kilometers, which is considered to be very acceptable.

Stearman 4 aircraft production was carried out in the following variants:

  • Stearman 4-C / C-4 / C-4A Junior Speedmail - Single version of the aircraft designed to carry on its board small cargo and mail;
  • Stearman 4-CM Senior Speedmail - Single improved version of the aircraft Stearman 4-C;
  • Stearman 4-D Junior Speedmail - An improved version of the aircraft, equipped with aircraft engine Pratt & Whitney Wasp Junior;
  • Stearman 4-DX Junior Speedmail - A modernized version of the version Stearman 4-D Junior Speedmail;
  • Stearman 4-DM Senior Speedmail - Zip version of the aircraft;
  • Stearman 4-E Junior Speedmail - A modified version of the aircraft, equipped with a Pratt & Whitney Wasp engine in 420 hp;
  • Stearman 4-EX Senior Speedmail - A single version of an improved version of the aircraft Stearman 4-E Junior Speedmail;
  • Stearman 4-EM Senior Speedmail - An improved version of the aircraft version of the Stearman 4-E Junior Speedmail;
  • Stearman 4-RM Special - Four-bed version of the aircraft;
  • Stearman Model 80 Sportster - The sports version of the aircraft;
  • Stearman Model 81 - Trainer version of the aircraft.

Today from 41 released copies in the world there is only 11 aircraft of this model.

Specifications Stearman 4.

  • Crew: 1 people;
  • Passenger: 2 people (depending on version);
  • aircraft Length: 8 m (depending on version).
  • Wingspan: 11,6 m (depending on version).
  • Plane Height: 3,2 m (depending on version).
  • Weight of empty aircraft: 1100 kg. (Depending on version);
  • Payload: 685 kg. (Depending on version);
  • Maximum takeoff weight: 1785 kg. (Depending on version);
  • Cruising speed: 205 km \ h. (Depending on version);
  • Maximum flight speed: 255 km \ h. (Depending on version);
  • Maximum flight distance: 1045 km. (Depending on version);
  • Maximum flight height: 5490 m .;
  • aircraft engine type: a piston;
  • Powerplant: Pratt & Whitney Wasp (depending on version);
  • Power: 450 hp .. (depending on version).

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